upstream/mercurial-mirror Files · contrib/dockerrpm

revlog: change generaldelta delta parent heuristic...

revlog: change generaldelta delta parent heuristic The old generaldelta heuristic was "if p1 (or p2) was closer than the last full text, use it, otherwise use prev". This was problematic when a repo contained multiple branches that were very different. If commits to branch A were pushed, and the last full text was branch B, it would generate a fulltext. Then if branch B was pushed, it would generate another fulltext. The problem is that the last fulltext (and delta'ing against `prev` in general) has no correlation with the contents of the incoming revision, and therefore will always have degenerate cases. According to the blame, that algorithm was chosen to minimize the chain length. Since there is already code that protects against that (the delta-vs-fulltext code), and since it has been improved since the original generaldelta algorithm went in (2011), I believe the chain length criteria will still be preserved. The new algorithm always diffs against p1 (or p2 if it's closer), unless the resulting delta will fail the delta-vs-fulltext check, in which case we delta against prev. Some before and after stats on manifest.d size. internal large repo old heuristic - 2.0 GB new heuristic - 1.2 GB mozilla-central old heuristic - 242 MB new heuristic - 261 MB The regression in mozilla central is due to the new heuristic choosing p2r as the delta when it's closer to the tip. Switching the algorithm to always prefer p1r brings the size back down (242 MB). This is result of the way in which mozilla does merges and pushes, and the result could easily swing the other direction in other repos (depending on if they merge X into Y or Y into X), but will never be as degenerate as before. I future patch will address the regression by introducing an optional, even more aggressive delta heuristic which will knock the mozilla manifest size down dramatically.

Augie Fackler - - Load All Authors

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Mads Kiilerich dockerrpm: check that docker is running correctly before building	r22438	#!/bin/bash -e
Matt Mackall build: initial support for in-tree autobuilding recipes	r21255
Augie Fackler dockerlib: start extracting common functions for setting up docker...	r24968	. $(dirname $0)/dockerlib.sh

Matt Mackall build: initial support for in-tree autobuilding recipes	r21255	BUILDDIR=$(dirname $0)
Augie Fackler dockerlib: extract initcontainer() method...	r24969	export ROOTDIR=$(cd $BUILDDIR/..; pwd)
Matt Mackall build: initial support for in-tree autobuilding recipes	r21255
Augie Fackler dockerlib: start extracting common functions for setting up docker...	r24968	checkdocker
Mads Kiilerich dockerrpm: check that docker is running correctly before building	r22438
Mads Kiilerich dockerrpm: better handling of specification of docker name	r22439	PLATFORM="$1"
Mads Kiilerich docker: add CentOS 5...	r22443	shift # extra params are passed to buildrpm
Mads Kiilerich dockerrpm: better handling of specification of docker name	r22439
Augie Fackler dockerlib: extract initcontainer() method...	r24969	initcontainer $PLATFORM
Mads Kiilerich dockerrpm: run docker build process as the current user, not as root...	r22440
Mads Kiilerich dockerrpm: prepare source outside docker and just run rpmbuild inside docker...	r22441	RPMBUILDDIR=$ROOTDIR/packages/$PLATFORM
Mads Kiilerich docker: add CentOS 5...	r22443	contrib/buildrpm --rpmbuilddir $RPMBUILDDIR --prepare $*
Mads Kiilerich dockerrpm: prepare source outside docker and just run rpmbuild inside docker...	r22441
		DSHARED=/mnt/shared
		$DOCKER run -u $DBUILDUSER --rm -v $RPMBUILDDIR:$DSHARED $CONTAINER \
		rpmbuild --define "_topdir $DSHARED" -ba $DSHARED/SPECS/mercurial.spec --clean
Mads Kiilerich dockerrpm: create a yum/dnf repo from the generated rpms...	r22444
		$DOCKER run -u $DBUILDUSER --rm -v $RPMBUILDDIR:$DSHARED $CONTAINER \
		createrepo $DSHARED

		cat << EOF > $RPMBUILDDIR/mercurial.repo
		# Place this file in /etc/yum.repos.d/mercurial.repo
		[mercurial]
Mads Kiilerich buildrpm: fix use of invalid $PLATFORM in mercurial.repo	r23124	name=Mercurial packages for $PLATFORM
Mads Kiilerich dockerrpm: create a yum/dnf repo from the generated rpms...	r22444	# baseurl=file://$RPMBUILDDIR/
Mads Kiilerich buildrpm: fix use of invalid $PLATFORM in mercurial.repo	r23124	baseurl=http://hg.example.com/build/$PLATFORM/
Mads Kiilerich dockerrpm: create a yum/dnf repo from the generated rpms...	r22444	skip_if_unavailable=True
		gpgcheck=0
		enabled=1
		EOF

		echo
		echo "Build complete - results can be found in $RPMBUILDDIR"

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